Locking plate



J. E. PHILLIPS LOCKING PLATE July 14, 1931.

Filed Jan. 23, 1930 1 Q \\\\nn \\\l r-\ INVENTOR .fflifies .f/ZZZ (/15 mE IE WITNESSES 3 @0 ATTORNEY Patented July 14, 1931 UNITE? STATES PATENTOFFICE This invention relates to locks and particularly to an improvedset of locking plates whereby the lock made jimmy-proof. The object ofthe device which may forms of locks and ping parts designed of a toolfor prying the door open or moving any part of the lock to aninoperative posi tion.

A further object of the invention is to provide a pair of coactingplates, one being adapted to be mounted on a door and the otheron a amband the parts so interlocked that the jamb plate ing parts of the doorplate and the door plate in turn will interloc prevent any separ plates.

ing the construction Figure 2 is a fragmentary sectional view throughFlgure 1 on line 2-2.

ure 2 on line 3-3;

Figure 4: is a view similar, to Figure 3 encept that the door plate hasbeen shown in position thereon;

Figure 5 is a view similar to Figure 1 but showing .a slight mo Figure 6is a side elevation of part of the locking jamb plate shown in Figure 5.

Referring to the by numerals, l'indicates a door, 2 a jamb, 3 aconventional lock operated by suitable lockoperating mechanism 4: ofwell known type secured in place by means. On jamb 2 an extension 6provi ture for receiving a plate 7 is mounted on door 1, said door platebeing provided with a suitable boss for hold ing the outer part 0 inplace.

The boss 8 and parts near the JAMES EDVTIN PHILLIPS, OF NEW YORK, N. Y.

LOCKING PLATE 7' Application filed January 23, 1930. Serial No. 422,859.

associated therewith is cept in combination.

same are old and well known and therefore form no part of the presentinvention ex- The lnvention resldes in the plates 5 and 7 at or adjacentthe point invention is to provide a be used with different whichpresents overlapto prevent the entrance tending section 10.

where they interlock as shown in Figure 1. :5 From Figures 1 and 4: itwill be noted that the plate 7 is provided with an upstanding ridge orflange portion 9 and an inwardly ex- Notches 11 and 12 are.

formed in section 10 as shown in Figure 1 so (1) as to accommodate theears or projections 13 will overlap the operatk with the jamb plate toation between the two Figure 8 is a sectional view through Figand 1 1 ofplate 5. These ears are preferably integral with the transverse section15 of plate 5 as shown in Figure 1. An upstanding c section 16 extendsfor the full length of sec- 5 tion 15 and is provided with a flange 17extending for a full length of section 16, said flange overlapping thethickened portion 9. This will positively prevent a jimmy from beingforced between the tions of plates 5 and 7. By the arrangement ofsection 16 and flange 17 a recess 18-is presented as shown in Figure 2,said recess bein g adapted to accommodate the thickened portion or bar 9while the lugs 13 and 14 extend T through the notches 11 and the partstogether in such cannot be forced apart. that the plates 5 and 7 areinterlocked so that they cannot be forced apart and that any 81)interlocked por- 1 a 12, thus locking a way that they It will be notedprying thereon attempting to force them dified structure;

accompanylng drawings suitable screws or other is a jamb plate 5 havingded with a suitable aperbolt of lock 3. A door nent locking bolt.

f the lock construction 4:

apart will not 1n any way screws which hold either plate Instead ofusing plate5 as shown in Fig-7 ure 1, a different form may be used asshown in Figure 5 if desired. When the structure in Figure 5 is to beused, the plate 5 is cut off at the outer edge of the jamb 2 and asecond plate 5 placed thereon, said second plate having an ear 19 andadapted to re W ceive the swinging locking member 20. In this form ofinvention the plates 5 and 5 are both provided with openings 21 and 22so as to receive a night latch and also a permaaffect the retaining inposition.

From this it will be seen that the flange from the keeper of any locknow on the market may be riveted onto plate 5, so that the jimmy-prooffeatures of the present invention may be secured for all looks.

What I claim is l. A pair of locking jamb plate and a door their pointof contact interlocking projections so that when the jalnb plate is incontact with the door plate the plates cannot be forced apart except inone direction, the interlocking projection on the jamb plate having anextending portion provided with a flange overlapping the projections onsaid door plate.

2. A pair of locking plates comprising a door plate and a jamb plate,said door plate having a notched extension said jamb plate being formedwith a section provided with a pair of ears fitting into the notches ofsaid notched extension and a flange overlapping said notch and the edgeof said jamb plate.

3. A pair of locking plates of the character described, comprising adoor plate and a jamb plate, said door plate having an extension providd with a pair of notches and a thickened portion adjacent said notchesextending for the full width of the door plate, said jamb plate having asection fitting over part of the door plate and provided with a pair ofears fitting into ,said notches and with a com bined upstanding sectionand flange overlapping said thickened portion of plate.

4. The combination with a door jamb and a door of a pair of interlockingplates coacting with said door and door jamb, said locking platescomprising a door plate and a jamb plate, said jamb plate having anopening for receiving the bolt of a lock and at the opposite end anupstanding section merging into an overhanging shoulder portion and intoa pair of cars, said provided with the aperturedextension adapted tooverlap the section of said jam-b plate and accommodate the ears of saidjamb plate, said door plate being also provided with a thickened portionextending for full length and fitting into said overhanging shoulderportion.

5. A pair of locking plates of the character described comprising a doorplate and a jamb plate, said door plat-e having an extension providedwith a pair of notches, said jamb plate having a section fitting overpart of the door plate and provided with a pair of cars fitting intosaid notches and with a combined plates comprising a plate, said platesat being formed with upstanding section and flange overlapping.

the portion of the door plate carrying said notches.

6. A pair of locking plates of the character described comprising a doorplate'and a jamb plate, said door plate having an extension providedwith a pair of notches, a thickened portion spaced from the edge of saiddoor plate and forming an upstanding flange extending from near one ofsaid notches tonear the other notch, said amb plate having a sectionfitting over part of the door plate and said door door plate being Yorkthis 2lst day

